In recent years, MXenes, a class of 2D transition metal carbides, nitrides, and carbonitrides, have attracted considerable attention due to their exceptional properties and versatility in a wide range of applications. The purpose of this chapter is to provide a brief overview of recent advances in the synthesis, characterization, and potential uses of MXenes as energy storage materials. Due to their intrinsic properties such as high electronic conductivity, large surface area, and tunable surface chemistry, MXenes are promising candidates for the storage of energy. The application of MXenes in energy storage has shown promise in supercapacitors, lithium-ion batteries, sodium-ion batteries, and electrochemical capacitors. Their high energy and power density, improved cycling stability, and shorter charging times enhance the performance of energy storage devices. In spite of this, obstacles still stand in the way of realizing the full potential of MXenes. There is an ongoing concern about scalability, environmental impact, as well as stability under prolonged cycling conditions. Additionally, this chapter highlights ongoing efforts to address these issues. In order to enhance properties and overcome limitations, techniques such as MXene composites, novel synthesis methods, and surface functionalization have been employed. As part of the chapter, a number of future opportunities are explored, including novel device designs, improvements in sustainability, and applications for emerging energy storage technologies. In summary, this chapter provides an overview of the application of MXenes for energy storage, emphasizing their remarkable features, their potential challenges, and their potential for the future. There is great promise in MXenes for the energy storage sector, as they can prove to be transformative materials for the sector and provide sustainable, high-performance solutions that can meet the world’s growing energy needs in the future. © 2024 Elsevier B.V., All rights reserved.